A Florida man faces upwards of 10 years in federal prison after pleading guilty this week to a revolting product tampering scheme in which he returned used enemas to the CVS pharmacy where he purchased the items.

Ronald Robinson, 35, entered his guilty plea to a single felony tampering charge during an appearance Wednesday in U.S. District Court in Jacksonville. A sentencing date has not been set for Robinson, who has been jailed since last year.

As detailed by prosecutors in a January 16 court filing, Robinson’s tampering occurred between April and June 2012 and involved his repeated purchase of enemas (six to a box) from a CVS in Jacksonville.

After using the enemas, Robinson (seen in the above mug shot) placed them back into their boxes, resealed the containers, and returned the products for refunds. The used enemas were then reshelved by CVS workers and later sold to other customers.

Robinson was collared after a CVS employee became suspicious about the frequency with which he was returning enema packages. On one occasion, Robinson told the worker that he had purchased the enemas for his mother, but “she no longer needed them,” according to a Jacksonville Sheriff’s Office report. When the worker examined the returned box, he “observed that all the enemas were used” and that the bottom of the package had been “re-glued…so that it appeared that it had not been opened.”